Fluid-operated band-punching machine



Sept. 25 1923.

H. w. KRANz ET AL- FLUID OPERATED BAND PUNCHING MACHINE Filed June 28, 1920 2 Sheets-Sheet l sept. 25, 1923, 1,488,788

H. W. KRANZ ET AL FLUID OPERATED BAND PUNCH-ING MACHINE Filed June- 28, 1820 2 sheets-sheet 2 ff j; if v @ffii i i l ff f4 #7 Patented Sept. 25, 1923.

HARRY wgKRANZ Ann .onniiuirns, er cnnvntnnnuonro,rissienons 'fro THE;

HYDRAULIC :ennssnn STEEL cora-rana", or onnvnrann, onie, e conPonATroN or OHIO.

FLUID-creeeren Benn-runcnrne iuncniitn.

Appiieationfiied June 2s, i920. serial` no. seege'nsf To @ZZ lwhom it' may concern:

Be it known that we, HARRY W. KRANZV and JOHN Lnnns, citizens ot the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful lmprovement in Fluid-perated Band-Punching Machines, of which the following is Va full,

clear, and exact descriptioin-referencebeing had to the accompanying drawings.

This invention rela-tes generally Vto ma `chines l*for punching rims, fans and more particularlyV to la fluid operated machine for punching telly bands. v

In the manufacture ot' automobile wheels it is customary to place asheet metal telly band upon the wooden ellynin the wheel body and this telly band is ordinarily formed with a base portion, aninwardly projecting flange portion which engages the outer face of the wooden telly while at the inner edge the :telly band is somewhat thickcned and provided with aV beveled or inclined flange against which the mountable tire carrying rim is intended to loe forced. These :telly bands are oit'. course' perforated ,or `formed with an opening ,for the valve Vstem of the tire and in some 'instances metallic boxes or `plates are riveted to the outer tace of the telly band upon opposite sides ofthe valve stem hole and the object of the present invention is to provide a machine which will at al single operation punch the valve stem hole and also punch holes upon opposite sides thereof to receiveV the rivets. which fasten the plates 'or blocks to the :telly band. V V

In addition to providinga fluid operating machine which will punch all of the holes at a single operation it is also the object of this invention to provide for the quick and easier removal of the punches and guides in case either shouldY become impaired, oi'v in case it is desired to changeor alter the relative position of the various holes.

` A lstill further object is to provide a machine embodying these characteristic Vteas tures which shall consist of a minimum num ber ofstrong and durable parts, easily ina.- nipulated to perform their various func@ tions.v Y 's lVith these objects in view and certain others which will become apparent as the :description` proceeds, the invention consists the manner of combining or arranging the saine all of 'which will fbe A'fully n described' g hereinafter and'po'inted out inthe cl aii ns. V 1 Qln the dra'wings'iiorining 'a partotlthis specification, Fig.A f1 isa side elevation o'f'a fluid loperated punching machine Yconstru'c'ted in accordance with 'our inventionQFig."Y 2 is a top plan view of the same; Fig.' Slis an end view F ig. l is a'central longitudinal sectional view 5. Fig'. isfa detail perspective eoY view of the guide block; Fig is a detail l perspective view ot one ofthe punches and plunger carryingV the sameand Fi'g'fis a' l `Y detailN perspective view of thej piston Yand f yoke carrying the punch VpliingersfY 'Referring to the drzuvi'riig's,10` indicates a Ys'nation#l Y ary base which may be o-'anyfdesired'size and shape'and `to which. is securely bolted the ,guidel block Vsaid'Cfuideblock havingV 'laterally projecting ears 12 through 'which the fastening bolts pass for the purpose'of vconnecting said block to the baseo the machine. Y @ne end of saidlolock 11 is cut away as shown and to this cutaway there is secured the double cylinder block 13.' f

In the other end ot-l therblock therei'sjcut a curved guideway 14E which is intended to receive a jiuellyband or rim 15 whichvis to be punchedjand the convex wall of this guideway 14 is 'recessed as shown at 16 to receive *the die block 17 therein.

rEhe guide block is valsof provided with a central guideway 18 which is preferably-arranged along tlie longitudinal axis o t the vblock' and upon each side of theicen-tral guideway 1S are theinclined gnideways 19" said guideways extending into and communicating with thecuivedguideway 14H in which the elly'band 'or rim isto be placed. llorking. in the centralguideway 18`is" a,

and which is intended', to punch fthe` valve extending longitudin,ally` tronrthe tace Vstem, hole in theA telly band, andY in eachV y `i Vguideway 19 is a plunger 22 carrying a Y 10o f between lugs 2lwhiletheplungers.Y Y' Y of the yoke 26 whil'ethe lugs 2 5 projefct'lat-l erally iii opposite directions rom'lthefsi'desf et the said yoke. The yoke 26 is rigidly l connectedS to a piston 27working inthecyl- .957' plunger 2OY carrying a'punch 21,at its end'.

inder 28 of the `double cylinder block 13, uid pressure being applied to said piston 27 through theV pipe 29 and in the cylinder 30 formed in the opposite end of the cylinder block there is a piston 31 connected to a yoke 32, the yoke 32 and yoke 26 being connected by tie rods 83 and fluid pressure is applied to the cylinder 30 by means of the pipe 34. 1t will be noted that the diameter of the cylinder 2S andV its piston 27 is considerable in excessv ofthe diameter of the cylinder y30 and its piston 81, the piston 27 Y being a power pistonl for the purpose' of effecting the punching operations whereas the piston 31 operates for theV purpose of leading the piston 27 and withdrawing the punches.

In'operation the felly band or rim 15 is `placed into guideway 14 and fluid pressure is applied to the cylinder 28 acting upon the piston 27 'forcing theyoke 26 toward the felly band or' rim carrying with it the central plunger 20 and side plungers 22 all of which are brought into engagement with the felly band or rim atv one time owing to the angular disposition kof the side punches which is made to conform to the curvature of the felly band or rim and consequently the valve stem hole and the rivet holes are all punched in one and the same operation. Then by the application of fluid pressure in the reverse direction the punchers are withdrawn and theV felly band or rim can be removed and another one Vinserted ready to be punched. The forward end of each plunger is slotted or recessed longitudinally as shown at 35 and also ltransversely as shown at 36,.

a longitudinal'slot or recess being adapted to receive the shank 37 of the punch while the foot piece 38 thereof its into the transverse slot and a cap piece 39 is bolted down over the shank portion and retains the same in place. The shank 37 carries a head 40 and this head 40 is formed with a recess 41 into which the enlarged end of the punch proper is inserted and the perforated plate 42 is fastened to the face of the head 40 for the purpose of retaining the punches proper within the head. By means of these special features of construction it is obvious that if one or more of the punches should become impaired they can be quickly and easily removed and replaced and in case it is desired to remove the entire head and replace the same with another head bearing punches differently Varranged it can be quickly and easily accomplished by removing the cap piece 39 lifting out the shank 37 and replacinganother head.

The guide vblock 11 is also` formed with aV longitudinal guideway 43 'in which the ytie rod33 and the lower end of the yoke 36 works and if desired, the double cylinder block can be provided with a slottedl lug- 44 to' guide the upper tie' rod. The block 11 is valve stem and rivet holes ina fellv band or rim and it will also be noted that the various punches and plunger-s operatin the same can be quickly and easily changerl or altered when necessary or desirable.

Having thus described our invention,

what we claim is:

V1. In a device of the kindv described, the combination with a guide block havinga fluid pressure cylinder connected thereto,'"of pistons working in said cylinder block,`said block having a circumferential guide 'wa-y to receive a rim or band, and one or more substantially longitudinal guide' ways eac-h adapted to receive a punch carrying plunger and means connecting said plunger or plungers with said pistons.

2. In a device of the kind described, the combination with a block having a rim lor band guide way, of a cylinder block and a piston working therein, a yoke operatively connected with said piston and one or more punch carrying plungers connected toY said yoke and movableV toward and away from said rim or band guide way.

3. ln a device of the kind described, the combination with a block'having a bandV and one or more plungerl guide ways,'of'a cylin" der block having one or more pistons working` therein, a plunger in each plunger guide way, a yoke to which said plunger or plungers are connected and means connecting said yoke and piston.

4. in a device of the kind described, the combination'with a guide block, of a cylinder block connected thereto, pistons working in said cylinder block, a yoke operatively connected to said pistons, a longitudinal plunger and lateral converging plungers connected to said yoke, said plungers working in guide ways in said guide block, said block also having a band guide provided with a die recess.

5. ln a device oi the kind described, the combination with a plunger having longitudinal and transverse slots at the forward end thereof, of a shank having a foot Vand head piece, a cap for holding the shank to the plunger',and one or more punches detachably connected to the "head,

6. In a device of the kind described, vthe combination with a plunger having longitudinal and transverse slots at the forward end thereof, of a shank having a foot' and head piece, a cap for holding the shankto the plunger, one or more punches having enlarged inner ends and a perforated plate attached to the head for securing said punch or punches to the head.

'7. In a device of the kind described, the combination with a plunger having a longi-V tudinal and transverse slot in the forward end, of a shank having a foot and head portion connected thereto, a cap piece, holding y the shank in saidy longitudinal slot, one or 10V I lmore punches having enlarged inner Vends, and arperforated plate attached to said headV and secnringsaid punch or punches in place. Y

In testimony whereof, We hereunto ailix our signatures. l'

i HARRY WKRANZ JOHN LUKES. it 

